Agricultural products traceability system is designed and implemented based on LPC1766 central processing unit to o-vercome the difficulties of tracing the origins and verifying the flow in the circulation phases. The hardware circuit includes LPC1766 core circuit, power, A/D, RFID interface, Ethernet interface. The function of weighing, electronic trading, product tracking, RFID identity recognition, two-dimensional bar code printing is implemented based on keil f/Vision3 IDE platform, including distributed control by means of wireless UDP. The results show that the system has good usability and high precision and improves management level, and implements effective tracing and tracking of agricultural products.%针对农产品流通过程中来源跟踪难、去向查证难等问题,研究开发了农产品流通追溯系统.该系统硬件采用Cortex-M3内核嵌入式处理器LPC1766,包括信号调理与A/D转换电路、RFID身份识别接口电路、以太网接口电路和其它外围接口电路.软件以keil μVision3 IDE为开发平台,论述了重量采集、RFID身份识别、二维条码打印、数据上传等的实现算法,并通过UDP的方式实现了分布式控制.实验结果表明,该追溯系统适用性强,追溯精度高,能有效提高交易管理水平,并能实现对产品责任主体的跟踪与追溯.
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